What a Weekly Progress Orthomosaic Gives a General Contractor

Most job sites already have plenty of photos. Phone pictures, a few overview shots, maybe an occasional aerial. What they often lack is a consistent, measurable record of the whole site taken the same way, on a regular schedule.

That is what a weekly progress orthomosaic provides.

What an orthomosaic actually is

An orthomosaic is a single, high-resolution aerial image of your entire site, stitched from hundreds of drone photos and corrected so that scale is consistent across the image. Unlike a regular aerial photo, you can measure on it: distances, areas, and, with the matching surface model, elevations and volumes.

When it is captured weekly on a consistent flight plan, each map lines up with the last. That turns a pile of images into a timeline.

Five ways GCs put it to work

1. Owner and stakeholder updates

A current, top-down view of the whole site answers “where are we?” faster than a written report. Owners, lenders, and architects can see progress for themselves, and dated maps make it easy to compare week to week.

2. Coordination and planning

Superintendents and PMs can review laydown areas, haul routes, staging, and access from the office. Measuring an area or checking a distance on the map can save a trip across the site.

3. Pay applications and quantity backup

When progress needs to be documented for a pay app, a dated orthomosaic, and for earthwork a cut/fill comparison, gives clear visual and measurable backup for what was completed in the period.

4. A record you can go back to

Weeks or months later, questions come up: when was that utility trench backfilled, what did the site look like before a subcontractor mobilized, where was that material stockpiled? A weekly archive lets you pull up the site on a specific date instead of relying on memory.

5. Underground and buried work

Once utilities and foundations are covered, they are hard to see again. Regular flights during that phase create a georeferenced visual record of what went in the ground and where.

What a good weekly program looks like

• Consistent flights. Same flight plan, similar time of day, same coordinate system, so maps line up week to week.
• Fast delivery. A map is most useful while the week is still current.
• Easy access. A web viewer the whole team can open, plus downloadable files for anyone who needs CAD or GIS.
• Right-sized deliverables. Not every week needs volumes. Many programs mix weekly maps with periodic quantity reports.

Is it worth it on your project?

Weekly mapping tends to make the most sense on projects with large footprints, significant earthwork or site utilities, multiple stakeholders who want visibility, or a history of disputes over schedule and quantities. On smaller or short-duration jobs, milestone-based flights may be the better fit.

Thinking about progress mapping for an upcoming project? Request a quote and we’ll help you choose the right frequency and deliverables.